:root{color-scheme:light;--bg: #f6f7f8;--surface: #ffffff;--surface-soft: #f0f2f4;--text: #1d2329;--muted: #5d6874;--line: #d8dde3;--primary: #22577a;--primary-hover:#173d56;--primary-light:#e6eef4;--accent: #8f5b2d;--green-light: #e9f0ed;--warning-bg: #fff8e6;--warning-line: #e5c55a;--code-bg: #17211d;--code-text: #e9f5ef;font-family:Pretendard,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,sans-serif}*,*:before,*:after{box-sizing:border-box}[hidden]{display:none!important}body{margin:0;background:var(--bg);color:var(--text);line-height:1.65}a{color:var(--primary);text-decoration:none}a:hover{text-decoration:underline}button,input,select,textarea{font:inherit}h1,h2,h3{line-height:1.25;letter-spacing:0}h1{font-size:clamp(1.8rem,4vw,3rem);margin:0 0 10px}h2{font-size:1.55rem;margin:0 0 18px}h3{font-size:1.05rem;margin:0 0 8px}p{margin:0 0 14px}label{font-weight:700;font-size:.92rem}input[type=number],input[type=range],select{width:100%;border:1.5px solid var(--line);border-radius:7px;padding:9px 12px;background:#fff;color:var(--text);transition:border-color .15s}input:focus,select:focus{outline:none;border-color:var(--primary)}.container{width:min(1100px,calc(100% - 32px));margin:0 auto}.page-wrap{padding:22px 0 56px}.site-header{border-bottom:1px solid var(--line);background:#fffffff2;backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:20px;min-height:60px;width:min(1100px,calc(100% - 32px));margin:0 auto}.brand{color:var(--text);font-weight:800;font-size:1.05rem}.nav{display:flex;flex-wrap:wrap;gap:14px;font-size:.9rem}.nav a{color:var(--muted)}.nav a[aria-current=page]{color:var(--primary);font-weight:700}main{min-height:72vh}.page-header{display:grid;gap:6px;margin-bottom:18px}.page-header .lead{color:var(--muted);font-size:1.05rem;margin:0;max-width:720px}.page-note{color:var(--muted);font-size:.9rem;margin:0}.upload-shell{margin-bottom:16px}.drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:10px;min-height:144px;padding:26px 20px;border:1.5px dashed #9aa9b6;border-radius:8px;background:var(--surface);text-align:center;cursor:pointer;transition:border-color .15s,background .15s}.drop-zone:hover,.drop-zone.drag-over{border-color:var(--primary);background:var(--primary-light)}.drop-zone input[type=file]{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}.drop-mark{width:56px;height:42px;border:2px solid #8192a3;border-radius:6px;position:relative;background:linear-gradient(135deg,transparent 50%,#d6dee6 51%) left 18px bottom 6px / 24px 18px no-repeat,linear-gradient(135deg,transparent 50%,#c5d1dc 51%) right 8px bottom 6px / 28px 22px no-repeat}.drop-mark:before{content:"";position:absolute;width:8px;height:8px;border-radius:50%;background:#8f5b2d;top:8px;left:10px}.drop-label{font-weight:700;font-size:1.1rem;color:var(--text)}.drop-zone small{color:var(--muted);font-size:.88rem}.file-bar{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;background:var(--surface-soft);border:1px solid var(--line);border-radius:8px;padding:12px 16px;margin-bottom:18px;font-size:.9rem}.file-info{color:var(--muted);font-weight:500;min-width:0;word-break:break-all}.reselect-btn{display:inline-flex;align-items:center;gap:6px;border:1.5px solid var(--line);border-radius:6px;background:#fff;padding:6px 14px;font-size:.88rem;font-weight:700;color:var(--text);cursor:pointer;white-space:nowrap;transition:border-color .15s}.reselect-btn:hover{border-color:var(--primary)}.reselect-btn input[type=file]{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden}.tool-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:8px;margin-bottom:20px}.tab-btn{border:1.5px solid var(--line);border-radius:6px;background:#fff;color:var(--muted);font-weight:700;font-size:.95rem;padding:12px 10px;cursor:pointer;transition:all .15s;display:flex;align-items:center;justify-content:center;gap:6px}.tab-btn:hover{background:var(--surface-soft);color:var(--text)}.tab-btn.active{background:var(--primary);border-color:var(--primary);color:#fff}.tab-panel[hidden]{display:none}.tool-layout{display:grid;grid-template-columns:300px 1fr;gap:20px;align-items:start}.tool-layout:has(.preview-col[hidden]){grid-template-columns:minmax(280px,420px)}.options-col{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:20px;display:flex;flex-direction:column;gap:0}.field{display:flex;flex-direction:column;gap:6px;margin-bottom:16px}.field-row{display:grid;grid-template-columns:1fr 1fr;gap:12px}.check-field{display:flex;align-items:center;gap:8px;margin-bottom:14px}.check-field input[type=checkbox]{width:auto;accent-color:var(--primary)}.presets{margin-bottom:18px}.presets-label{display:block;font-weight:700;font-size:.88rem;color:var(--muted);margin-bottom:8px}.preset-btn{display:block;width:100%;border:1px solid var(--line);border-radius:6px;background:var(--surface-soft);padding:8px 12px;text-align:left;cursor:pointer;font-size:.85rem;font-weight:600;color:var(--text);margin-bottom:6px;transition:background .12s,border-color .12s;line-height:1.4}.preset-btn:hover{background:var(--primary-light);border-color:var(--primary)}.preset-btn em{display:block;font-style:normal;font-weight:400;color:var(--muted);font-size:.8rem}.format-badge{background:var(--surface-soft);border:1px solid var(--line);border-radius:6px;padding:9px 12px;font-weight:700;color:var(--primary)}.range-hint{display:flex;justify-content:space-between;font-size:.78rem;color:var(--muted);margin-top:2px}.hint{font-size:.85rem;color:var(--muted);margin-bottom:14px;line-height:1.5}.error-list{list-style:none;padding:0;margin:0 0 12px;font-size:.88rem;color:#b52d2d}.error-list:empty{display:none}.run-btn{display:block;width:100%;background:var(--primary);color:#fff;border:0;border-radius:6px;padding:13px 16px;font-weight:800;font-size:1rem;cursor:pointer;transition:background .15s;margin-top:auto}.run-btn:hover{background:var(--primary-hover)}.preview-col{background:var(--surface);border:1px solid var(--line);border-radius:8px;padding:20px;display:flex;flex-direction:column;gap:14px}.preview-pair{display:grid;grid-template-columns:1fr 1fr;gap:12px}.preview-pair figure{margin:0}.preview-pair figcaption{font-size:.82rem;font-weight:700;color:var(--muted);margin-bottom:6px}.preview-pair img{display:block;width:100%;aspect-ratio:4/3;object-fit:contain;border:1px solid var(--line);border-radius:6px;background:linear-gradient(45deg,#e8eeeb 25%,transparent 25%),linear-gradient(-45deg,#e8eeeb 25%,transparent 25%),linear-gradient(45deg,transparent 75%,#e8eeeb 75%),linear-gradient(-45deg,transparent 75%,#e8eeeb 75%);background-size:16px 16px;background-position:0 0,0 8px,8px -8px,-8px 0}.preview-pair img[src=""],.preview-pair img:not([src]){display:none}.preview-empty{display:flex;align-items:center;justify-content:center;width:100%;aspect-ratio:4/3;border:1.5px dashed #b4c5be;border-radius:6px;background:var(--surface-soft);color:var(--muted);font-size:.85rem;text-align:center;padding:12px}.result-meta{background:var(--surface-soft);border:1px solid var(--line);border-radius:6px;padding:10px 14px;font-size:.88rem;color:var(--muted);line-height:1.5}.download-btn{display:block;text-align:center;background:var(--primary);color:#fff!important;border-radius:6px;padding:13px 16px;font-weight:800;font-size:1rem;text-decoration:none!important;transition:background .15s}.download-btn:hover{background:var(--primary-hover)}.ad-slot{margin:22px 0 0;border-radius:6px;overflow:hidden;background:var(--surface-soft);border:1px dashed var(--line);min-height:90px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:.8rem}.ad-slot:before{content:"광고 영역"}.ad-slot--horizontal{width:100%}.guide-links{display:flex;flex-wrap:wrap;gap:10px 14px;margin-top:18px;font-size:.9rem}.guide-links a{color:var(--muted);font-weight:700}.guide-links a:hover{color:var(--primary)}.faq-section{margin-top:0}.faq-item{border-top:1px solid var(--line);padding:18px 0}.faq-item h3{margin:0 0 6px;font-size:1rem}.faq-item p{color:var(--muted);font-size:.92rem;margin:0}.content{max-width:820px;padding:40px 0 72px}.content h2{margin-top:40px}.content table{width:100%;border-collapse:collapse;background:var(--surface)}.content th,.content td{border:1px solid var(--line);padding:10px;text-align:left}.lead{color:var(--muted);font-size:1.05rem;max-width:680px}.eyebrow{color:var(--accent);font-weight:800;margin:0 0 8px}.notice{border:1px solid var(--warning-line);background:var(--warning-bg);border-radius:8px;padding:14px 18px;margin:16px 0}.notice strong{color:#6f4900}.card{background:var(--surface);border:1px solid var(--line);border-radius:10px;padding:20px}.card h3{margin-top:0}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.site-footer{border-top:1px solid var(--line);background:var(--surface);padding:24px 0;color:var(--muted);font-size:.88rem}.footer-inner{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap;width:min(1100px,calc(100% - 32px));margin:0 auto}.footer-links{display:flex;gap:14px;flex-wrap:wrap}.footer-links a{color:var(--muted)}.footer-links a:hover{color:var(--text)}@media(max-width:860px){.tool-layout,.grid{grid-template-columns:1fr}}@media(max-width:680px){.header-inner{flex-direction:column;align-items:flex-start;padding:12px 0;gap:10px}.tool-tabs{grid-template-columns:1fr;gap:6px}.preview-pair,.field-row{grid-template-columns:1fr}h1{font-size:1.6rem}}